.mvVideo {
    width: 90%;
    transition: 1s;
}
.mv {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.mv p {
    margin: 20px;
}
.btn {
    width: 100px;
    height: 50px;
    font-size: 20px;
    margin-bottom: 10px;
}
